Timer ( PWA ) - Circuit Board NORTHSTAR series NS filter valves newer PWA = 7366685 ( with auxiliary connection available ).Includes NSSFSSA, NSANSSA, NSTOFSSA, NSAPFSSA, and NSAPFXLA water filters ( not water softeners ).Models after 2013 switched to DC ( from AC used on older model ).AC board ( 7286699 ) is Obsolete ( no longer available ).
Used with models such as NS AIIF2, ,NSSFSSA, NSANSSA, NSTOFSSA, NSAPFSSA,NSAPFXLA.Link to North Star Manual NOTE: Many times the problem is with the microswitch, wiring harness, or turbine meter and not the actual Circuit Board.